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- Title
Identification and Characterization of the WOX Family Genes in Five Solanaceae Species Reveal Their Conserved Roles in Peptide Signaling.
- Authors
Li, Xiaoxu; Hamyat, Madiha; Liu, Cheng; Salman, Ahmad; Gao, Xiaoming; Guo, Cun; Wang, Yuanying; Guo, Yongfeng
- Abstract
Members of the plant-specific WOX (WUSCHEL-related homeobox) transcription factor family have been reported to play important roles in peptide signaling that regulates stem cell maintenance and cell fate specification in various developmental processes. Even though remarkable advances have been made in studying <italic>WOX</italic> genes in <italic>Arabidopsis</italic>, little is known about this family in <italic>Solanaceae</italic> species. A total of 45 WOX members from five <italic>Solanaceae</italic> species were identified, including eight members from <italic>Solanum tuberosum</italic>, eight from <italic>Nicotiana tomentosiformis</italic>, 10 from <italic>Solanum lycopersicum</italic>, 10 from <italic>Nicotiana sylvestris</italic> and nine from <italic>Nicotiana tabacum</italic>. The newly identified WOX members were classified into three clades and nine subgroups based on phylogenetic analysis using three different methods. The patterns of exon-intron structure and motif organization of the WOX proteins agreed with the phylogenetic results. Gene duplication events and ongoing evolution were revealed by additional branches on the phylogenetic tree and the presence of a partial WUS-box in some non-WUS clade members. Gene expression with or without CLE (clavata3 (clv3)/embryo surrounding region-related) peptide treatments revealed that tobacco <italic>WOX</italic> genes showed similar or distinct expression patterns compared with their <italic>Arabidopsis</italic> homologues, suggesting either functional conservation or divergence. Expression of <italic>Nicotiana tabacum WUSCHEL</italic> (<italic>NtabWUS</italic>) in the organizing center could rescue the <italic>wus-1</italic> mutant phenotypes in <italic>Arabidopsis,</italic> implying conserved roles of the <italic>Solanaceae</italic> WOX proteins in peptide-mediated regulation of plant development.
- Subjects
TOMATO genetics; STEM cells; TRANSCRIPTION factors; ARABIDOPSIS thaliana; SOLANACEAE
- Publication
Genes, 2018, Vol 9, Issue 5, p260
- ISSN
2073-4425
- Publication type
Article
- DOI
10.3390/genes9050260